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Throughput with large ruleset
I have an interesting situation that I would love some advice on. We have a
client that has a roughly 24Mb/s net connection. He would like to run all of
his bandwidth through 1 firewall. Normaly I wouldnt be worried but he has a
rather large ruleset. He has almost 100 rules. 40 or so are fairly standard.
block port 80 on ip x.x.x.x etc. He also has 50 - 60 trafic shaping rules.
Right now he is running then through his cisco. He wants to put these rules
on the firewall. I have used ALTQ for this before but never with this amount
of bandwidth.and with as extensive a firewall ruleset. If anyone has any
expiriance with something like this, what I would like to know is potential
problems with OpenBSD+PF+ALTQ with this much bandwidth. Also, The box is
going to have 5 NICs. 1 external and 4 internal to his differant network
segments. No NATing but he doesnt want the firewall to noticably slow his
traffic. In this situation how fast a box are we talking about? I was
planning on a 1Ghz box with 256 meg DDR ram. Is that going to be enought to
handle this load??